Is Your Cadillac SRX Acting Up? It Could Be The Brains of the Operation.
If you’re dealing with a frustrating check engine light that won’t go away, rough idling, sudden stalling, or a car that simply refuses to start, the problem often lies with the heart of your engine’s management system: the Engine Control Module (ECM). Over my 20+ years turning wrenches and diagnosing these exact issues, I’ve seen countless drivers replace expensive sensors and parts, only to find the root cause was the ECM all along. This is especially common in vehicles like the 2004-2006 Cadillac SRX with the 3.6L engine.
This isn’t just a replacement part; it’s a complete, hassle-free solution. We are offering a genuine, used OEM Engine Control Module that has been meticulously tested and is ready for a new life in your vehicle. The best part? We handle the expensive and time-consuming programming for you. Simply provide your vehicle’s VIN at checkout, and we’ll flash the module with the latest GM software updates specific to your SRX. It arrives at your door ready to install, saving you a trip to the dealer and hundreds of dollars in programming fees.
Symptoms of a Failing 2004-2006 SRX ECM
A faulty engine computer can cause a wide range of confusing symptoms. If you’re experiencing any of the following, a failing ECM is a likely culprit:
- ✔ Persistent Check Engine Light (CEL) with various codes
- ✔ Engine stalling or shutting off while driving
- ✔ Noticeable decrease in fuel economy
- ✔ Hesitation or stumbling during acceleration
- ✔ Complete no-start condition where the engine cranks but won’t fire
- ✔ Communication errors with diagnostic scan tools
Expert Pro Tip: Check Your Connections First
Before you install your replacement ECM, take a moment to inspect and clean the wiring harness connectors. Over the years, I’ve seen dozens of jobs where poor contact, not a bad module, was the real issue. Use a dedicated electronics contact cleaner and a small nylon brush to gently scrub away any green or white corrosion from the pins and sockets. A clean, solid connection is critical for the new module to communicate properly with all the vehicle’s sensors. This simple five-minute step can prevent a world of diagnostic headaches.
Plug-and-Play Installation: No Dealer Visit Required
Getting your SRX back to peak performance is straightforward. Since we program the module to your VIN, the security information is matched, allowing for a direct installation. For the 2004-2006 SRX, you’ll find the ECM in the right-hand (passenger side) front of the engine compartment.
- Safety First: Disconnect the negative terminal from your vehicle’s battery and wait a few minutes for the system to discharge.
- Locate the ECM: Open the hood and find the module on the passenger side of the engine bay. It’s a silver metal box with large electrical connectors.
- Disconnect the Harnesses: Carefully release the locking tabs on the wiring harness connectors and pull them straight out from the module. Avoid wiggling them side-to-side, which can damage the pins.
- Remove the Old Module: Unbolt the mounting hardware holding the original ECM in place and remove it from the vehicle.
- Install the New Module: Bolt your new, pre-programmed ECM into the same location.
- Reconnect Everything: Firmly plug the wiring harnesses back into the new module until the locking tabs click into place. Reconnect the negative battery terminal.
- Final Step: Start the engine. The vehicle will recognize the new module, and you’ll be ready to drive.
Guaranteed Compatibility and Fitment
This module is a direct replacement for several service part numbers, ensuring wide compatibility. This part is a confirmed fit for the following vehicles and options:
- Cadillac SRX: 2004-2006 (3.6L, RH front engine compartment)
- Cadillac CTS: 2004-2006 (Base, ID 12592124 or 19260507, RH engine compartment)
- Cadillac CTS: 2007 (Base, RH engine compartment)
- Buick Allure: 2005-2008 (3.6L, lower air cleaner housing)
- Buick LaCrosse: 2005-2008 (3.6L, lower air cleaner housing)
- Buick Rendezvous: 2004-2005 (ID 19260507, LH engine compartment)
- Buick Rendezvous: 2006 (3.6L)
This part replaces the following service numbers: 12581144, 12588472, 12592124, 19260507. Please verify one of these numbers is on your original module to ensure a perfect match.